package com.lumacong.websocket.server;

import com.alibaba.fastjson.JSON;
import com.lumacong.websocket.service.DsPrizeService;
import com.lumacong.websocket.service.MysqlService;
import com.lumacong.websocket.vo.DsPrize;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import javax.websocket.*;
import javax.websocket.server.ServerEndpoint;
import java.io.IOException;
import java.util.List;
import java.util.concurrent.CopyOnWriteArraySet;

@ServerEndpoint(value = "/douSoundWavesTopServer")
@Component
public class DsPrizeServer {
    // 静态变量，用来记录当前在线连接数。应该把它设计成线程安全的。
    private static int onlineCount = 0;

    // concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。
    private static CopyOnWriteArraySet<DsPrizeServer> webSocketSet = new CopyOnWriteArraySet<DsPrizeServer>();

    // 与某个客户端的连接会话，需要通过它来给客户端发送数据
    private Session session;

    private static MysqlService mysqlService;
    private static DsPrizeService dsPrizeService;

    // 注入的时候，给类的 service 注入
    @Autowired
    public void setChatService(MysqlService mysqlService, DsPrizeService dsPrizeService) {
        DsPrizeServer.mysqlService = mysqlService;
        DsPrizeServer.dsPrizeService = dsPrizeService;
    }

    /**
     * 连接建立成功调用的方法
     */
    @OnOpen
    public void onOpen(Session session) {
        this.session = session;
        webSocketSet.add(this);
        addOnlineCount();
        try {
            List<DsPrize> dsPrize = dsPrizeService.findAll();
            if (dsPrize.size() != 0) {
                sendMessage(JSON.toJSONString(dsPrize.get(0)));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * 连接关闭调用的方法
     */
    @OnClose
    public void onClose() {
        webSocketSet.remove(this); // 从set中删除
        subOnlineCount(); // 在线数减1
    }

    /**
     * 收到客户端消息后调用的方法
     *
     * @param message 客户端发送过来的消息
     */
    @OnMessage
    public void onMessage(String message, Session session) {
        System.out.println("来自客户端的消息:" + message);

        // 群发消息
        for (DsPrizeServer item : webSocketSet) {
            try {
                item.sendMessage(message);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    /**
     * 发生错误时调用
     */
    @OnError
    public void onError(Session session, Throwable error) {
        System.out.println("发生错误");
        error.printStackTrace();
    }

    public void sendMessage(String message) throws IOException {
        this.session.getBasicRemote().sendText(message);
    }

    /**
     * 群发自定义消息
     */
    public static void sendInfo(String message) {
        for (DsPrizeServer item : webSocketSet) {
            try {
                item.sendMessage(message);
            } catch (IOException e) {
                continue;
            }
        }
    }

    public static synchronized int getOnlineCount() {
        return onlineCount;
    }

    public static synchronized void addOnlineCount() {
        DsPrizeServer.onlineCount++;
    }

    public static synchronized void subOnlineCount() {
        DsPrizeServer.onlineCount--;
    }

    public Session getSession() {
        return session;
    }

    public void setSession(Session session) {
        this.session = session;
    }

    public static CopyOnWriteArraySet<DsPrizeServer> getWebSocketSet() {
        return webSocketSet;
    }

    public static void setWebSocketSet(CopyOnWriteArraySet<DsPrizeServer> webSocketSet) {
        DsPrizeServer.webSocketSet = webSocketSet;
    }
}
